Alviso’s All-Salt has been well researched. We’ve looked into how pharmaceuticals get into South Bay water, and which ones are most prevalent where we harvest our salt.
We’ve put together a report and case study on drugs passing through the San Jose/Santa Clara wastewater treatment plant, and pharmaceuticals found in the Artesian Slough and larger South San Francisco Bay, which you can download here (pdf): Report: Drugs in Water
For addition information, here are some outside websites that are an excellent resource on the subject.
What is it?
Where is it?
What to do about it?